Switch



(N-O Model.)

B. M. HEWLETT. SWITCH.

Patented Dec. 15, 18 96.

FEL

\A/ Nrzssas.

UNITED STATES PATENT ()FFICE.

EDlVARD M. HElVLETT, OF SOI'IENEOTADY, NE\V YORK, ASSIGNOR TO THE GENERAL ELECTRIC COMPANY, OF NElV YORK.

SWITCH.

SPECIFICATION forming part of Letters Patent No. 573,146, dated December 15, 1896.

Application filed July 16, 1896. Serial No. 599,444. (No inodcld T at wit/0m it m y 0 06 small current, such as is given by a battery, Beit known that I, EDWARD M. HEWLETT, while the latter, being in series with the a citizen of the United States, residing at source of supply and the work, carries all of Schenectady, in the county of Schenectady, the current when the circuit is closed be- 5 State of New York, have invented certain tween the contacts O and O. The coils are new and useful Improvements in Switches, provided with a common core D, Fig. at, (Case No. 412,) of which the following is a which at its inner end is secured to a U- specification. shaped piece having arms a a, forming pole- The present invention relates to magnetpieces. On the outer end of the core is se- 1o ically-operated switches,and is designed more cured, by means of the screw E, a pole-piece particularlyior use in closed-conduit railway F, which extends upward at right angles to systems, where a small current, such as that the core D and is provided with an enlarged from a battery, is used for closing the switch, pole-face, which has its greatest width in a after which the battery-circuit is broken and direction parallel to the arcing electrodes G [5 the main currentholds the switch in its closed and H. To secure thepole-pieces and ener position until the traveling vehicle ceases to gizing-coils to the base A, bolts 0 are emtake current, when the switch opens the main ployed. circuit and closes the battery-circuit in the Secured to the arms a d are two supports switch. I I, provided at their outer extremities with 20 One object of the present invention is to slots which form bearings for the lugs J and make a cheap and reliable switch adapted to J of the frame K. The frame K is made of rapidly make and break the circuit and one non-magnetic material and is adapted to carry provided with means for disrupting the arc the spring M on its inner end and the armaformed at the time the circuit is interrupted. ture L and pole-piece Q at the outer. 25 The invention further consists in utilizing The lower end of the frame is bifurcated the switch-operating coils for energizing the and the ends 7; and 7t" pass 011 the sides of the pole-pieces of the blow-out magnet. chute S, in which are located the contacts G The invention also relates to details of conand II and in a manner such that any are strnction more fully pointed out hereinafter. formed between them will be restrained to its 0 In the accompanying drawings, attached to proper direction. The armature L extends and made a part of this specification, Figure across the front of the magnetBand is adapted 1 is a front elevation of a switch embodying to be attracted by the arms a d, which form my invention. Fig. 2 is a side elevation of a part of the magnetic system. the same. Fig. 3 is a plan, and Fig. 4 is a The pole-piece Q is secured at its base to 3 5 section on the line 4 at of Fig. 1. Fig. 5 is a the armature L and extends upward, where diagram of connections. it terminates in an enlarged pole-face, which The base A is made of slate or other suitis parallel with that of the po1e-piece F. The able insulating material, and is adapted to lines of force passing from Q to F tend to blow be secured to a support in the position shown. the are formed between G and H upward, and 0 40 On the upper portion of the base are secured it will be seen that they are in such a direcby means of screws two binding-posts O 0, tion that when the pole-piece Q is moved, due the wire from the post 0 leading to the work to the action of the magnet 13, the lines of circuit and that from the post 0 to the coil force between Q and F will have no effect Z) and the supply-main. The binding-posts upon its movement, they being at right an- 5 5 also furnish supports for the carbon contacts gles to those which attract the armature L.

O and 0 These are adapted to be screwed Carried by the pole-piece Q, but suitably up or down for the purpose of adjusting, and insulated therefrom, is the contact G, which the bolt P is used to clamp them in place. is composed of a copper contact-button and The actuating-coil B is composed of two is adapted to engage with an adjustable car- I00 50 separate coils Z2 and Z). The former is inbon contact H, secured in a suitable clamp tended to operate the switch by means of a R. The contact Gbeing carried by the polepiece Q, as soon as the armature L is attracted the circuit of the fine-wire coil 1) is interrupted; but at that instant the spring M on the arm K closes the circuit between the carbon contacts O O by means of the copper contacts in m, which are mounted 011 the spring M. This completes the circuit through the coil Z), which energizes the coil D and the arms a a, the lines of force passing from the arms a a" to the armature Ii, thence upward through the pole-piece Q to the pole-piece F, disrupting any are which may be formed between the electrodes G and II, thence to the core I), the latter forming the other pole of the magnet.

The chute Sis made of insulating material and is secured by screws to the pole-piece F. The carbon-holder R is secured to the chute S and is made in such a manner that the carbon can be advanced as it burns or wears away. By providing a screwthread ad justment for the carbon contacts 0 and 0 they may be accuratelyset, and the clamping-bolt 1? holds them in place.

The frame K is supported in such a manner that it can readily be removed in case it is desired to replace the contacts. The screws which hold the contact G in place are removed, and the frame with its other attachments can be lifted bodily.

Fig. 5 shows the connections of the circuit. V is the supply-mam, and the coil 1) is connected between it and the stationary carbon contact 0 \V is a contact located at any suitable point and is rendered active when the armature K, provided with the contacts on m, bridges the space between the carbon contacts O and O. The coil Z) is permanently connected through a resistance to the wire leading from the contact V at one end and to the ground through the contacts G and II at the other. If current is supplied to the contact \V with the switch in its present position, the coil 1) will energize its core and attract the armature L, closing the circuit between 0 and O and interrupting it between G and II. The circuit will remain closed as long as the current continues to flow through coil 1), after which gravity will return it to the position shown.

What I claim as new, and desire to secure by Letters Patent of the United States, is

1. I11 an electric switch, the combination of a stationary electrode, a movable electrode, a blow-out magnet provided with a movable polepiece, and an armature adapted to actuate the movable electrode and the pole-piece.

2. In an electric switch, the combination of a stationary electrode, a movable electrode supported by a portion of the blow-out-magnet structure and insulated therefrom, and a polepiece for the magnet adapted to move with the movable electrode.

In an electric switch, the combination of a plurality of stationary electrodes, a blowout magnet provided with a movable polepiece, a contact secured to the pole-piece, and an energizing-coil on the magnet for actuating the switch and blowing out the are formed by the interruption of the circuit at the contacts.

el. In an electric switch, the combination of an energizing-coil, a core for the coil provided. with pole-pieces, arms secured to the polepieces formingasupport foramovable frame, an electrode moving with the frame, and a magnet-pole secured to the frame and adapted to blow out the are formed between the electrodes.

5. In an electric switch, the combination of pole-pieces situated on the sides of the energizing-magnet,arms secured to the pole-pieces forming a support for a movable frame, a polepiece secured to the core of the magnet, a chute supported by the pole-piece, and a polepiecc mounted on the movable frame.

6. In an electric switch, the combination of binding-posts secu red to the base, adj ustablc contacts mounted in the posts, a contact-piece adapted to bridge the space between the contacts, a pivoted frame carrying the contact piece, a chute in which a pair of contacts are located, and a blow-out magnet-pole carried by the moving frame.

7. In an electric switch, the combination of a blow-out magnet having a stationary polepiece pro ided with an enlarged face, and a movable pole-piece also provided with an enlarged face, the two faces being so arranged that they are parallel to the direction of movement of the armature which actuatcs the moving pole'piece.

In an electric switch, the combination of bindingposts secured to the base, screwthreaded carbon contacts mounted in the posts, clamping-lmlts for securing the contacts in place, copper contacts engaging with the carbon contacts, and a movable frame actuated by a magnet for closing the circuit between the carbon and copper contacts.

In witness whereof I have hereunto set my hand this 13th day of July, 1896.

\Yitnesscs:

1 13. IIULL, J. LED. LANcnoN. 

